Spring中有两种bean类型,一般bean和工厂bean
一般bean:定义的类型和返回的类型统一
工厂bean:定义的类型和返回的类型能够不统一
工厂bean的实现:
实现FactoryBean接口中的getObject办法,如

public class MyBean implements FactoryBean<Course>{  public Course getBean(){    Course course = new Course();    course.setName("语文");    return course;  }}

xml创建对象

<bean id="myBean" class="com.zong.spring.MyBean"></bean>

测试

public void test(){  ApplicationContext context = new ClassPathXmlApplicationContext("bean.xml");  Course course = context.getBean("myBean",Course.class);  System.out.println(course);}